Structure of Bacillus Subtilis Bacteriophage Phi25 and Phi25 Deoxyribonucleic Acid

Overview

Journal J Virol

Publisher American Society for Microbiology

Date 1970 Jul 1

PMID 4990530

Citations 4

Authors

W F Liljemark

D L Anderson

Affiliations

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Abstract

The structure of Bacillus subtilis bacteriophage phi25 and phi25 deoxyribonucleic acid (DNA) were studied by electron microscopy. The head of phi25 is a regular polyhedron measuring 75 nm in diameter. The uncontracted tail of phi25 is 130 nm in length and includes a large, complex tail plate. Phage phi25 DNA is double-stranded and has a molecular weight of approximately 100 million as determined by electron microscopic length measurements and analytical band sedimentation in CsCl. The complementary strands of phi25 DNA contain numerous random interruptions. Chemical analysis of phi25 DNA demonstrated that 5-hydroxymethyluracil replaces thymine and that the DNA has a mole per cent (guanine plus cytosine) of 42.

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Morphology and physiology of the intracellular development of Bacillus subtilis bacteriophage phi25.

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